Ultrafast proton-assisted tunneling through ZrO2 in dye-sensitized SnO2-core/ZrO2-shell films

John R. Swierk, Nicholas S. McCool, Jason A. Röhr, Svante Hedström, Steven J. Konezny, Coleen T. Nemes, Pengtao Xu, Victor S. Batista, Thomas E. Mallouk, Charles A. Schmuttenmaer

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Abstract

Core-shell architectures are used to modulate injection and recombination in dye-sensitized photoelectrochemical cells. Here, we demonstrate that exposing SnO2-core/ZrO2-shell films to acid permits photoinduced electron transfer through ZrO2-shells at least 4 nm thick. A novel mechanism of charge transfer is proposed where protonic defects permit ultrafast trap-assisted tunneling of electrons.

Original languageEnglish (US)
Pages (from-to)7971-7974
Number of pages4
JournalChemical Communications
Volume54
Issue number57
DOIs
StatePublished - Jan 1 2018

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Swierk, J. R., McCool, N. S., Röhr, J. A., Hedström, S., Konezny, S. J., Nemes, C. T., Xu, P., Batista, V. S., Mallouk, T. E., & Schmuttenmaer, C. A. (2018). Ultrafast proton-assisted tunneling through ZrO2 in dye-sensitized SnO2-core/ZrO2-shell films. Chemical Communications, 54(57), 7971-7974. https://doi.org/10.1039/c8cc04189j